function chstr_b()
{
	 var email = document.getElementById('news-inpt');

	 if(email.value === "")
	 {
			email.value = "Your e-mail";

	 }


}

function chstr_f()
{
     var email = document.getElementById('news-inpt');
	 if(email.value === "Your e-mail")
	 {

		 email.value = "";

	 }

}